Reliance Worldwide Corporation (UK) Ltd are the exclusive distributors of Aquasystem® expansion vessels in the UK. The range incorporates an extensive choice of sizes and connection formats to suit most uses. The range includes vessels for heating systems and potable water, together with special application vessels for solar systems.

Aquasystem pressure vessels are manufactured to comply with UK water regulations and are tested and certified by WRAS. All Aquasystem pressure vessels are supplied with a replaceable membrane, which separates the water and air, to prevent contamination of the water system, corrosion of the pressure vessel or pressure loss in the water system.